The Queen needs your code-breaking help!

An Enigma machine rotor

An Enigma machine rotor. Copyright Simon Singh

The Queen and the Duke of Edinburgh will visit Bletchley Park today to unveil a memorial to the codebreakers who played a vital role in the second world war. To celebrate their visit the Queen has challenged UK children aged between 13 and 16 to crack six secret messages. Visit the British Monarchy Website to download the code book and get started!

You can read more about Bletchley Park, the enigma machine and cryptography on Plus and learn more about codebreaking and the enigma machine from The Enigma Project.